US President Donald Trump has slammed the ruling of a judge of San Francisco's federal court as ridiculous which blocked an executive order that could deny funds to the so-called sanctuary cities harboring illegal immigrants. <br/><br/>In a tweet, Mr Trump said, he will challenge the court orders in the Supreme Court. Judge William Orrick yesterday issued a preliminary injunction barring any attempt to implement Mr Trump's January 25 executive order. Earlier, federal courts have also blocked his two travel bans on citizens of mostly Muslim nations.